Has anyone tried Blue Devil Rear Main Seal Stop Leak?

Dana67Dart said

According to rock auto the 65 225 rear crank seal is a 2 piece rubber.

Now that does not mean that the OEM seal wasn't rope.

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That is because the two piece rubber seal is backwards compatible and is used to service the rope seals. It is possible to find NOS rope seals, but the two piece rubber seal is a superior sealing solution.